GNSS Meter

Worldsensing’s GNSS Meter is a wireless sensor designed for high-precision, automated measurement of surface point movements. It features advanced multi-band Real-Time Kinematic (RTK) technology and innovative edge processing that delivers millimetric precision with great reliability.

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Product information:

Key Features

  • Achieves sub-centimeter precision (down to 2mm) with hourly position updates, offering two aggregation levels: 6h and 24h.
  • Flexible configuration: operates seamlessly as both a base and rover, with field tools for radio link testing
  • Advanced edge data processing allows position quality and system performance statistics transmitted via radio and available in CMT
  • Battery-powered with D-size batteries, providing over 3 years of autonomy
  • Integrated tiltmeter and environmental sensors measure vertical shifts in structures and provide data when RTK conditions are unavailable

Applications

  • Track 3D ground movements in structures, foundations, and infrastructure
  • Monitor 3D ground movements, such as coastal subsidence or shifts caused by swelling rocks and expansive soils
  • Monitor landslides, open pits, and unstable slopes

Technical Specifications

  • Sensor type: GNSS
  • Secondary Sensor: Tiltmeter
  • Environmental Sensor: Integrated temperature and humidity sensor
  • Power source: 4 x 3,6 V D-size user-replaceable, high energy density batteries
  • Reporting Period: 1 h
  • Communications: LoRa radio (ISM sub GHz)
  • GNSS time synchronization: ±1s
  • Reporting Format: Position (WGS84) data for
    • Last hour sample
    • Last 6 h aggregated
    • Last 24 h aggregated
  • System configuration: Device setup and configuration via Worldsensing App. Remote configuration using CMT Edge. Data can be exported to third-party software via MQTT, REST API, or FTP.

GNSS Sensor

  • Correction Technology: Real time Kinematic (RTK)
  • GNSS Channels: 184
  • Constellations/ GNSS Signals received:
    • GPS / QZSS: L1C/A, L2
    • GLONASS: L1OF, L2OF
    • Galileo: E1-B/C, E5b
    • BeiDou: B1I, B2I
  • GNSS warmup time: Selectable from 10 s, 20 s, 30 s

Tiltmeter

  • Sensor type: 3-axis MEMS accelerometer
  • Range: ±90º
  • Accuracy:
    • ± 2º: ± 0.0025º
    • ± 15º: ± 0.013º
    • ± 80º: ± 0.23º
  • Offset temperature dependency: ± 0.002°/°C

GNSS Precision 95th Percentile

Distance base to rover 1 h last sample 6 h aggregated 24 h aggregated
40 m Horizontal 9 mm 3 mm 2 mm
40 m Vertical 20 mm 5 mm 3 mm
4 000 m Horizontal 21 mm 8 mm 4 mm
4000 m Vertical 31 mm 15 mm 7  mm

Battery life estimations

Warmup time 10 s 20 s 30 s
Base 3.1 years 2.7 years 2.4 years
Rover 3.5 years 2.9 years 2.5 years

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